.\"
.\"  eeprog.8 - manpage for the i2c-tools/eeprog utility
.\"  Copyright (C) 2013  Jaromir Capik
.\"
.\"  This program is free software; you can redistribute it and/or modify
.\"  it under the terms of the GNU General Public License as published by
.\"  the Free Software Foundation; either version 2 of the License, or
.\"  (at your option) any later version.
.\"
.\"  This program is distributed in the hope that it will be useful,
.\"  but WITHOUT ANY WARRANTY; without even the implied warranty of
.\"  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
.\"  GNU General Public License for more details.
.\"
.TH eeprog "8" "Jul 2013" "i2c-tools" "System Administration"
.SH NAME
eeprog \- reads and writes 24Cxx EEPROMs connected to I2C serial bus
.SH SYNOPSIS
.B eeprog
[-fqxdh] [-16|-8] [-r addr[:count]|-w addr] <device> <i2c-addr>
.SH DESCRIPTION
.B eeprog
uses the SMBus protocol used by most of the recent chipsets.
.SH NOTE
Don't forget to load your i2c chipset and the i2c-dev drivers.
.P
The following environment variables could be set instead of the command line arguments:
.P
    EEPROG_DEV              device
.br
    EEPROG_I2C_ADDR         i2c-addr
.SH PARAMETERS
.I Address modes
.TP
.B \-8
Use 8bit address mode for 24c0x...24C16 [default]
.TP
.B \-16
Use 16bit address mode for 24c32...24C256
.TP
.I Actions
.TP
.B \-r addr[:count]
Read
.B count
(1 if omitted) bytes from
.B addr
and print them to the standard output
.TP
.B \-w addr
Write input (stdin) at address
.B addr
of the EEPROM
.TP
.B \-h
Print this help
.TP
.I Options
.TP
.B \-x
Set hex output mode
.TP
.B \-d
Dummy mode, display what *would* have been done
.TP
.B \-f
Disable warnings and don't ask confirmation
.TP
.B \-q
Quiet mode
.TP
.I Bus
.TP
.B device
Device file representing the I2C bus (eg. /dev/i2c-0)
.TP
.B i2c-addr
I2C bus address of the EEPROM (eg. 0x3A)
.SH EXAMPLES
Read 64 bytes from the EEPROM at address 0x54 on bus 0 starting at address 123 (decimal)
.P
.B 	eeprog
/dev/i2c-0 0x54 -r 123:64
.P
Print the hex codes of the first 32 bytes read from bus 1 at address 0x22
.P
.B 	eeprog
/dev/i2c-1 0x51 -x -r 0x22:0x20
.P
Write the current timestamp at address 0x200 of the EEPROM on bus 0 at address 0x33
.P
 	date |
.B eeprog
-f /dev/i2c-0 0x33 -w 0x200
.SH AUTHOR
Stefano Barbato
